Cheap Flight Tickets from Seattle (SEA) to St Louis (STL), Starting at $359

Good to Know: Cheapest and Fastest SEA - STL Flights

Useful information for finding best airline tickets from Seattle Tacoma International to Lambert St Louis International on your next trip.

Cheapest Round Trip Flight

$359

UA United Airlines • 1 stop • 12h 4m

Jul 29 – Jul 30

The cheapest round trip flight from Seattle to St Louis (SEA-STL-SEA) is currently $359

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Cheapest One way Flight

$450

UA United Airlines • 1 stop • 17h 21m

Jun 22

The cheapest one way flight from Seattle to St Louis (SEA-STL) is currently $450

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Cheapest Direct Flight

$363

WN Southwest Airlines • nonstop • 5h 50m

Jul 29

The cheapest nonstop flight from Seattle to St Louis (SEA-STL) is currently $363

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Fastest Flight

5h 50m

The fastest nonstop flight from Seattle to St Louis (SEA-STL) takes 5h 50m

Latest Flight Deals from Seattle (SEA) to St Louis (STL)

Compare and book low fare round-trip air tickets from Seattle to St Louis. Ideal for travelers with confirmed return itineraries.

Jul 29 - Jul 30, Economy
UA
Seattle → St Louis
12h 4m
2:33 PM - 11:57 PM • 1 stop
UA
Seattle → St Louis
10h 22m
4:48 PM - 9:10 PM • 1 stop
$359
United Airlines
Jul 29 - Jul 30, Economy
AA
Seattle → St Louis
10h 35m
11:56 PM - 8:31 AM • 1 stop
AA
Seattle → St Louis
12h 13m
7:24 PM - 12:57 AM • 1 stop
$359
American Airlines
Jul 29 - Jul 30, Economy
DL
Seattle → St Louis
10h 47m
11:59 PM - 8:46 AM • 1 stop
DL
Seattle → St Louis
12h 22m
11:18 AM - 5:00 PM • 1 stop
$376
Delta Airlines
Jul 29 - Jul 29, Economy
AA
Seattle → St Louis
13h 31m
7:10 AM - 5:21 PM • 1 stop
AA
Seattle → St Louis
10h 56m
7:56 PM - 12:52 AM • 1 stop
$449
American Airlines
Jul 29 - Jul 30, Economy
AA
Seattle → St Louis
5h 51m
1:06 PM - 6:57 PM • nonstop
AS
Seattle → St Louis
7h 8m
7:56 PM - 10:24 PM • nonstop
$453
American Airlines
Jul 29 - Jul 29, Economy
WN
Seattle → St Louis
12h 30m
6:30 AM - 4:20 PM • 1 stop
WN
Seattle → St Louis
25h 10m
9:15 PM - 10:25 AM • 1 stop
$505
Southwest Airlines

Fly from Seattle to St Louis with the Best Airfare Deals on FareLeaders

Looking for a cheap last-minute deal or the best round-trip flight from Seattle to St Louis? Find the biggest savings on one-way and round-trip tickets right here.

FAQs on Seattle to St Louis Flights

What are the airports in Seattle?
SEA
What’s the most popular airline flying from SEA to STL?
The most popular airline flying from Seattle to St Louis are
Can I fly from SEA to STL non-stop?
Yes, you can fly SEA to STL non-stop on
Which airlines fly nonstop between Seattle and St Louis?
The non-stop flights between Seattle and St Louis are .
What’s the earliest departure time from SEA to STL Airport?
The earliest flight leaves SEA at 6:30 am and lands in STL - Lambert St Louis International
What are the airports in St Louis?
STL
Can I make changes to my Seattle to St Louis flight tickets or cancel them on FareLeaders.com?
No. We are an airfare comparison site. All the tickets are booked by the travel agent offering the flight deal and any changes or cancellations to be made are directly done directly by them or the airlines.
Can I cancel my flight tickets from SEA to STL?
Read the fare rules of the Seattle to St Louis air tickets booked. Some airlines allow you to cancel the tickets within a stipulated time period with a cancellation fee.
Which airline alliances offer flights from Seattle and St Louis?
operate flights between Seattle and St Louis
How long does a flight from Seattle to St Louis take?
It takes approximately 4 hour to fly non-stop from SEA to STL, which is 1709.07 miles by air.
Which airlines provide the cheapest flights from Seattle (SEA) to St Louis (STL) ?
In the past couple of days, the cheapest tickets to STL from SEA were found on AS : USD 735
Do I need a passport to fly between SEA and STL?
No
What’s the latest departure time from SEA to STL ?
The last flight leaves SEA at 11:5600 am

Essential Information for Booking Flights from Seattle (SEA) - AI Insights

What's the cheapest airline from sea to stl?
You can find budget-friendly flights from Seattle to St. Louis on Frontier Airlines (F9), which offers a premium business class experience with priority check-in, lounge access, and flatbed seats.
What's the popular airline to fly from sea to stl?
You can fly from Seattle Tacoma International Airport (SEA) to Lambert St Louis International Airport (STL) on Southwest Airlines. As a business class passenger, you'll enjoy priority check-in, lounge access, and flatbed seats. With two stops, your flight will be a bit longer, but still relatively affordable due to Southwest's competitive airfares. Booking in advance can help you save even more on your airfare.
What's the cheapest day of the week to fly from sea to stl?
The cheapest day of the week to fly from Seattle to St. Louis is typically Saturday. Flying on Saturdays can result in budget-friendly flights as it tends to be less busy than other days. For your specific Business class ticket, booking at least 15 days in advance may help secure a low fare.
What's the cheapest month to fly from sea to stl?
The cheapest month to fly from Seattle to St. Louis is November, as it tends to have lower airfares compared to other months. Booking in advance can help secure a budget-friendly flight.
Which airline/airlines fly from sea to stl?
You can fly from Seattle Tacoma International Airport (SEA) to Lambert St Louis International Airport (STL) on the following airlines: Southwest Airlines, Aeromexico, American Airlines, Alaska Airlines, United Airlines, Volaris Airline, Sun Country Airlines, Delta Airlines, Frontier Airlines, and JetBlue Airways. These budget-friendly flights offer a range of options for your one-way trip with 4 passengers in Business class.
What is the cheapest airfare from Seattle to St Louis?
The cheapest airfare from Seattle to St Louis can be found on Frontier Airlines (F9) with prices starting at ₣200. Book your flight today!
How many advance booking days do I need for this flight?
For the given trip, you should book your flight at least 15 days in advance to get the best deals.
Can I book flights directly on your website or through another airline's platform?
You can book flights directly on our website or through other airlines' platforms like Southwest Airlines (WN) and Aeromexico (AM).
Are there any discounts available for business class passengers?
Yes, business class passengers can enjoy exclusive discounts with Southwest Airlines (WN). Don't miss out on these amazing deals!
Can I cancel or change my flight if needed?
You can cancel or change your flight up to a certain period before departure. Please check the airline's policies for more information.
What are the web-based tools and resources available to help me plan my trip?
Our website offers a range of web-based tools, including flight comparison, booking engines, and travel guides. Plan your trip like a pro with our awesome resources!
What is the cheapest month to book my flight?
Book your flight in November for the best deals!

Seattle (SEA) to St Louis (STL): Airport Information

Origin Airport Seattle Tacoma International , Seattle, US
Destination Airport Lambert St Louis International , St Louis, US
Distance 1709 miles

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